JP6161843B1 - Glass product manufacturing apparatus, glass product manufacturing method, and platinum group metal recovery method - Google Patents

Abstract

An object of the present invention is to provide a glass product manufacturing apparatus capable of recovering impurities contained in molten glass. An apparatus for manufacturing a glass product 100 includes an inlet 10 into which a glass material is charged, a glass melting furnace 20, at least one nozzle 41, and a heating means 70 for heating the glass melting furnace 20 and the nozzle 41. And at least one cooling means 80. The glass melting furnace 20 has at least an inner wall surface formed of a refractory material, is continuous with the charging port 10, and melts the charged glass material to generate molten glass. The nozzle 41 is provided in the lower part of the glass melting furnace 20, and discharges molten glass. The cooling means 80 is disposed between the nozzle 41 and the high temperature region where the molten glass has the maximum melting temperature in the glass melting furnace 20, and cools the molten glass to a temperature lower than the maximum melting temperature of the molten glass. [Selection] Figure 1

Description

  The present invention relates to a glass product manufacturing apparatus.

  A glass fiber spinning furnace for producing glass fibers is generally formed of an alloy of platinum and rhodium (Pt / Rh) and has a melting region and a spinning region. The melting region in the glass fiber spinning furnace is heated to a temperature equal to or higher than the melting temperature of the glass material, and the glass material charged into the melting region is melted. The molten glass in the molten state is introduced into the spinning region, and the molten glass is discharged from the nozzle to produce glass fibers.

  Patent Document 1 discloses a glass fiber spinning furnace having a melting region and a spinning region that are configured by a combination of plates of platinum-based materials. In this glass fiber spinning furnace, the melting region and the spinning region are arranged in series with respect to the current flow, and the resistance of each region is also connected in series. Therefore, by reducing the width and thickness of the platinum material plate constituting the melting region and increasing the resistance of the melting region, the heat generation in the melting region can be increased and the temperature can be increased. Thereby, while ensuring the heat_generation | fever in a fusion | melting area | region, the quantity of the platinum-type material used for the board | plate body of a fusion | melting area | region can be reduced, and precipitation of platinum-type material can be suppressed.

Japanese Patent Publication No.59-6826

  However, in Patent Document 1, even when the width and thickness of the platinum material plate in the melting region are reduced, the platinum material and the like are melted from the plate by heating the plate to a high temperature. Contained as impurities. When such a platinum-based material is deposited at the nozzle, the nozzle is clogged, which adversely affects the production of glass fibers via the nozzle. Further, the loss of expensive platinum-based materials causes an increase in cost due to replacement of a plate of platinum-based material. However, Patent Document 1 does not disclose anything about how to recover the impurities contained in the molten glass.

  Then, an object of this invention is to provide the manufacturing apparatus of the glass product which can collect | recover the impurities contained in the molten glass.

  An apparatus for manufacturing a glass product according to an aspect of the present invention includes an inlet into which a glass material is charged, a glass melting furnace, at least one nozzle, a heating means for heating the glass melting furnace and the nozzle, and at least one Cooling means. In the glass melting furnace, at least the inner wall surface is formed of a refractory material, and is continuous with the charging port, and melts the charged glass material to generate molten glass. At least one nozzle is provided in the lower part of the glass melting furnace, and discharges molten glass. At least one cooling means is disposed between a nozzle and a high temperature region where the molten glass has a maximum melting temperature in the glass melting furnace, and cools the molten glass to a temperature lower than the maximum melting temperature of the molten glass.

  According to the above configuration, the cooling means is arranged between the high temperature region where the molten glass has the highest melting temperature and the nozzle, and the cooling means cools the molten glass to a temperature lower than the maximum melting temperature. By the cooling means, impurities melted in the molten glass, for example, a part of the refractory material that is melted together with the glass material can be deposited. Thereby, impurities adhering to the cooling means can be collected, and a glass product made of molten glass with few impurities can be discharged from the nozzle.

  In the said glass product manufacturing apparatus, the partition member provided in the area | region containing a high temperature area | region and partitioning a glass melting furnace to an up-down direction can be further provided. The partition member is formed so as to incline upward as it goes from the center to the end, and has an opening at the end.

  According to the above configuration, since the partition member that is inclined upward from the central portion toward the end portion is provided in the region including the high temperature region of the glass melting furnace, the molten glass is in the process from the inlet to the nozzle. Once it is received by the partition member, it can flow on the partition member so as to climb from the center to the opening at the end along the slope. Therefore, the residence time of the molten glass on the partition member can be increased. Thereby, the time for melt | dissolving solid glass completely can be ensured, and the solid glass in a molten glass can be melt | dissolved completely. And the glass product which does not have lumps (crystalline substance which consists of at least 1 or more of a glass component) can be manufactured with the molten glass in which the solid component in molten glass became low enough.

  In the glass product manufacturing apparatus, the cooling means can cool the molten glass to a temperature close to the molten glass at the nozzle or to a temperature equal to or lower than the temperature of the molten glass at the nozzle.

  Thereby, the cooling means arrange | positioned before the nozzle can cool to the temperature close | similar to the temperature of the molten glass in a nozzle, or below the temperature of the molten glass in a nozzle. Therefore, precipitation of impurities contained in the molten glass can be promoted before the nozzle, and the impurities can be recovered by the cooling means. Therefore, since molten glass with few impurities can be supplied with respect to a nozzle, malfunctions, such as a nozzle clogging with an impurity, can be suppressed. Moreover, the glass product which consists of molten glass with few impurities can be discharged from a nozzle.

  In the said glassware manufacturing apparatus, a cooling means can be comprised so that it may have a recessed part open | released upwards. Since the cooling means is configured to have a concave portion that opens upward, the molten glass is accommodated in the concave portion, and then overflows from the concave portion, for example, and flows to the nozzle side. Therefore, the molten glass can be convected in the cooling means due to a temperature difference between the molten glass that is in contact with the cooling means and the molten glass that is not in contact. As a result, not only the molten glass is cooled by contact with the cooling means, but also the molten glass is mixed by convection in the cooling means, thereby increasing the amount of molten glass to be cooled and improving the cooling speed. To do. As a result, it is possible to efficiently cool the molten glass and precipitate the molten impurities in the molten glass.

  In the apparatus for producing glass products, the heating means has a terminal for applying a voltage to the glass melting furnace and causing a current to flow in a predetermined direction, and the cooling means is constituted by a conductive member through which a current flows. A member can be arrange | positioned so that it may extend in the direction which cross | intersects the predetermined direction where an electric current flows.

  According to this configuration, since the cooling unit is disposed so as to intersect with a predetermined direction of the current flowing by the voltage applied to the heating unit, it is possible to make it difficult for the current to flow through the cooling unit. This is because a potential difference is provided to the heating means at both ends in a predetermined direction, while current flows in the longitudinal direction of the cooling means that intersects the predetermined direction due to the same principle as the bridge circuit. This is because current is difficult to flow. Therefore, the cooling means can be adjusted to a temperature lower than the maximum melting temperature in the glass melting furnace.

  In the apparatus for manufacturing glass products, the refractory material is a metal composed of a simple platinum element; a metal composed of a simple rhodium element; a metal composed of a simple palladium element; a metal composed of a simple gold element; a metal compound containing a platinum element; A metal compound containing palladium; a metal compound containing palladium element; a metal compound containing gold element; an alloy composed of two or more selected from the group consisting of platinum element, rhodium element, palladium element and gold element; and refractory bricks At least one selected from.

In the glass product manufacturing apparatus, the nozzle can be configured to allow molten glass to pass through and solidify by cooling and discharge.
In the glass product manufacturing apparatus, the glass product is glass fiber, glass roving, glass flake, glass pellet, glass bead, glass filler, or glass marble.
A glass product manufacturing method according to an aspect of the present invention uses the glass product manufacturing apparatus.
The platinum group metal recovery method according to an aspect of the present invention is a step of preparing the glass product manufacturing apparatus, wherein the refractory material contains a platinum group metal, and deposited on the cooling means. Recovering the platinum group metal.

  ADVANTAGE OF THE INVENTION According to this invention, the manufacturing apparatus of the glass product which can collect | recover the impurity contained in the molten glass can be provided.

The perspective view of the glass fiber manufacturing apparatus concerning one embodiment of the present invention. The side view of the manufacturing apparatus of the glass fiber of FIG. The top view of the manufacturing apparatus of the glass fiber of FIG. It is a schematic diagram of the 1st member, (a) is a top view which looked at the 1st member from the upper surface, and (b) is a side view of the 1st member. It is a schematic diagram of the 2nd member, (a) is a top view which looked at the 2nd member from the upper surface, (b) is a side view of the 2nd member. (A) is an enlarged view of one cooling means, (b) is an expanded view of one cooling means. FIG. 3 is an enlarged view of a portion A in FIG. 2, and is a schematic diagram illustrating a state in which a cooling unit is disposed below the second member. The side view which shows a mode that the cooling means is attached to the side wall. The side view of the manufacturing apparatus of the glass fiber using the cooling means of another example. The top view of the manufacturing apparatus of the glass fiber of FIG. The schematic diagram which shows the cooling means of another example. The schematic diagram which shows the cooling means of another example. The side view of the manufacturing apparatus of the glass fiber in which two 2nd members are provided. The perspective view of the manufacturing apparatus of the glass fiber of another form. The side view of the manufacturing apparatus of the glass fiber of FIG. The perspective view which shows a mode that the cooling means is attached to the side wall. The side view of the manufacturing apparatus of solid glass. The schematic diagram which shows a mode that the cooling means is attached to the 2nd member and the side wall. It is a schematic diagram which shows a mode that the cooling means is attached to the 2nd member, and it is an enlarged view of the part of B of FIG. The side view of FIG.

<1. Embodiment>
Hereinafter, an embodiment of a glass product manufacturing apparatus according to the present invention will be described with reference to the drawings. Here, a glass fiber is mentioned as an example of a glass product, and the example which applied this invention to the manufacturing apparatus of glass fiber is demonstrated.

  FIG. 1 is a perspective view of a glass fiber manufacturing apparatus according to an embodiment of the present invention. FIG. 2 is a side view of the glass fiber manufacturing apparatus of FIG. FIG. 3 is a top view of the glass fiber manufacturing apparatus of FIG. In FIGS. 1 and 2, a part of the side wall is omitted so that the inside of the glass fiber manufacturing apparatus can be visually recognized. The glass fiber manufacturing apparatus 100 according to the present embodiment includes a charging port 10 into which a glass material is charged, a glass melting furnace 20 that is a region for melting the charged glass material, and a plurality of discharging glass materials that are melted. The nozzle member 40 in which the nozzle 41 is formed.

  Below, the structure of each part of the manufacturing apparatus 100 is demonstrated. In the following, description will be given in the direction shown in FIG. 1, that is, up, down, front, back, right, left. Specifically, the direction between the inlet 10 and the nozzle member 40 is the vertical direction. In addition, the direction in which heating means 70a and 70b described later face each other is the left-right direction, and the vertical direction and the direction orthogonal to the left-right direction are the front-rear direction. The description will be made according to these directions, but the present invention is not limited by these directions.

(1) Input port 10
In the upper part of the manufacturing apparatus 100, an insertion port 10 for introducing a glass material is provided. The inlet 10 is formed by a cylindrical body that penetrates in the vertical direction, and is connected to the upper end of the glass melting furnace 20. Further, the charging port 10 is formed to be smaller than, for example, the glass melting furnace 20 in a top view, whereby the opening of the glass melting furnace 20 by the charging port 10 can be reduced, and the temperature in the glass melting furnace 20 can be reduced. Can be suppressed.

(2) Glass melting furnace 20
The glass melting furnace 20 includes a casing that melts the glass material charged from the charging port 10. This casing has a pair of side walls 101a, 101b facing in the left-right direction, 101c, 101d facing in the front-rear direction, and an upper wall 102. It is formed in a substantially rectangular parallelepiped shape having a space. And this glass melting furnace 20 is formed with the refractory material mentioned later. Further, in the internal space of the glass melting furnace 20, a first member (partition member) 50 and a second member 60 arranged in the downward direction from above are disposed, and the internal space includes the first and second members 50, By 60, it is partitioned into a first region 21, a second region 23, and a third region 25 in order from the top. The glass melting furnace 20 is provided with a heating means 70 for melting the glass material. Hereinafter, the members constituting the glass melting furnace 20 will be described in detail.

(2-1) Heating means 70
On the right side and the left side of the glass melting furnace 20, heating means 70a and 70b are provided. Each of the heating means 70a and 70b includes an electrode terminal, and a voltage is applied from a power source (not shown). Thereby, in the manufacturing apparatus 100, a current along the direction between the heating means 70a and 70b, that is, the left-right direction flows, and the glass melting furnace 20 is heated. The heating means 70 heats the glass melting furnace 20 so that, for example, the viscosity of the glass material is 400 poise or less. And any point in the 1st area | region 21 of the glass melting furnace 20 is a high temperature area | region where a molten glass becomes the highest melting temperature in the manufacturing apparatus 100. FIG. The heating means 70 is configured to adjust the spinning speed, fiber thickness, strength, and the like of the glass fiber discharged from the nozzle 41 by heating the nozzle member 40 in addition to the inside of the housing. Yes.

(2-2) First member 50
4A and 4B are schematic views of the first member. FIG. 4A is a plan view of the first member as viewed from above, and FIG. 4B is a side view of the first member. The first member 50 is formed in a rectangular plate shape corresponding to the shape of the rectangular glass melting furnace 20. If it demonstrates in detail, the 1st member 50 is attached to the side walls 101a-101d of the glass melting furnace 20 by welding etc., for example so that a plate-shaped surface may follow a left-right direction. As shown in FIGS. 1, 2, and 4, the first member 50 is formed in a V shape in a side view. That is, it inclines so that it may go upward as it goes to the right end part 52a and the left end part 52b from the center part 51 of the left-right direction, and the right end part 52a and the left end part 52b are connected with the left and right side walls 101a and 101b. . The right end 52a is formed with openings 53a (openings 53a1 and 53a2) arranged in the front-rear direction, and the left end 52b is formed with openings 53b (openings 53b1 and 53b2) arranged in the front-rear direction.

  As will be described later, the first member 50 completely melts the solid glass in the molten glass in the first region 21 by the inclination from the central portion 51 toward the right end portion 52a and the left end portion 52b. Therefore, in the first member 50, the left and right inclination angles θa and θb with the central portion 51 as the center are adjusted so that the solid glass in the molten glass can be sufficiently dammed with respect to the horizontal direction. In other words, the inclination angles θa and θb are such that the molten glass in the first region 21 gradually flows from the central portion 51 toward the openings 53a and 53 of the end portions 52a and 52b and stays there. It is adjusted to such an extent that the dissolution time can be secured. Since the viscosity of the molten glass varies depending on the type and temperature of the glass material, it is preferable to vary the inclination angles θa and θb depending on, for example, the type of glass material and the maximum melting temperature.

  Similarly, the distances La and Lb from the central portion 51 to the ends of the openings 53a and 53b on the central portion 51 side are also adjusted so that the molten glass can be retained and the solid glass can be sufficiently melted. ing. In addition, since the molten glass from which the solid glass has completely disappeared is supplied from the openings 53a and 53b to the second region 23, the distances La and Lb are approximately the same, and the inclination angles θa and θb are also approximately the same. Is preferred.

(2-3) Second member 60
The second member 60 is disposed between the second region 23 and the third region 25. 5A and 5B are schematic views of the second member. FIG. 5A is a plan view of the second member as viewed from above, and FIG. 5B is a side view of the second member. The second member 60 is formed in a rectangular plate shape corresponding to the shape of the rectangular glass melting furnace 20. The second member 60 is attached to the side walls 101a to 101d of the glass melting furnace 20, for example, by welding or the like so that the plate-like surface extends in the left-right direction. As shown in FIGS. 1, 2, and 5, the second member 60 is inclined upward as it goes from the central portion 61 in the left-right direction toward the right end portion 62 a and the left end portion 62 b in a side view. In other words, the central portion 61 of the second member 60 is closer to the lower nozzle member 40 than the right end portion 62a and the left end portion 62b.

  The second member 60 is formed with a plurality of rectangular openings 63 penetrating the plane in the vertical direction. The openings 63 are formed to be alternately located. That is, for example, the opening 63a and the opening 63b are formed so that the positions in the front-rear direction and the left-right direction are shifted.

  The second member 60 mixes the molten glass in the second region 23 substantially uniformly by an inclination from the right end portion 62a and the left end portion 62b toward the central portion 61. Therefore, in the second member 60, the left and right inclination angles θc and θd with respect to the center portion 61 with respect to the left and right direction are determined by the molten glass in the second region 23 from the right end portion 62 a and the left end portion 62 b to the center portion. As it flows toward 61, it is adjusted to such an extent that it can be mixed almost uniformly. Since the viscosity of the molten glass varies depending on the type and temperature of the glass material, for example, it is preferable to vary the inclination angles θc and θd depending on the type and temperature of the glass material.

  Further, the distances Lc and Ld from the central portion 61 to the right end portion 62a and the left end portion 62b are substantially the same so that the molten glass can be mixed almost uniformly and flow out of the opening 63, and the inclination angles θc and θd. Are also preferably substantially the same.

(2-4) Cooling means 80
As shown in FIGS. 1 and 2, below the second member 60, a plurality of cooling means 80 made of, for example, a conductive member is disposed corresponding to the plurality of openings 63 of the second member 60. ing. The cooling means 80 is means for cooling the molten glass to a temperature lower than the maximum melting temperature at any point in the first region 21 described above. In the present embodiment, the cooling means 80 has a V-shape when viewed from the side. The cooling means 80 will be further described with reference to FIGS.

  FIG. 6A is an enlarged view of one cooling means, and FIG. 6B is a development view of one cooling means. FIG. 7 is an enlarged view of a portion A in FIG. 2, and is a schematic diagram illustrating a state in which the cooling unit is disposed below the second member. FIG. 8 is a side view showing the cooling means attached to the side wall. The cooling means 80 of this embodiment is a member formed by bending a plate-like member shown in FIG. 6B into a V-shape shown in FIG. The cooling means 80 has a shape in which one side and the other side are substantially symmetric with a V-shaped tip 81 extending in one direction as a center. Therefore, only one side of the cooling means 80 will be described, and description of the other side will be omitted.

  On one side of the cooling means 80, an inclined portion 82a extends from the tip end portion 81, thereby forming one of the V-shaped inclinations. From both ends 83a and 83b of the inclined portion 82a, connecting portions 84a and 84b extend along a V-shaped inclination. Both end portions 83a and 83b are opposed to each other along a direction extending to the distal end portion 81 at a position away from the distal end portion 81. An attachment portion 85a is connected to the connection portion 84a, and an attachment portion 85b is connected to the connection portion 84b. The attachment portions 85a and 85b extend in directions opposite to each other along the direction in which the tip portion 81 extends. Further, the attachment portions 85a and 85b are bent at a predetermined angle with respect to the coupling portions 84a and 84b. The attachment portion 85a has a plate-like surface 85a1 and side wall side surfaces 85a2 that contact the side walls 101c and 101d extending in the left-right direction of the glass melting furnace 20. Similarly, the attachment portion 85b has a plate-like surface 85b1 and a side wall side surface 85b2.

  Since the connecting portions 84a and 84b extend from both ends 83a and 83b of the inclined portion 82a, the inclined portion 82a is in a recessed position with respect to the connecting portions 84a and 84b, and a stepped portion 87a is formed. Further, since the inclined portion 82b is recessed with respect to the connecting portions 84c and 84d at a position symmetrical to the step portion 87a with respect to the tip portion 81, a step portion 87b is formed. Furthermore, as described above, the attachment portions 85a and 85c extend in a direction away from the inclined portions 82a and 82b. Therefore, with respect to the attachment parts 85a and 85c, the inclined part 82a and the inclined part 82b are in a recessed position, and a step part 86a is formed. Similarly, the attachment portions 85b and 85d extend in a direction away from the inclined portions 82a and 82b. Therefore, a stepped portion 86b is formed by the inclined portion 82a and the inclined portion 82b and the mounting portions 85b and 85d.

  As shown in FIG. 7, the cooling means 80 is disposed so as to correspond to the lower part of the opening 63. The number of cooling means 80 is not limited, but seven cooling means 80 are provided in this embodiment. As shown in FIGS. 7 and 8, these cooling means 80 are such that the side wall side surfaces 85 a 2 to 85 d 2 of the attachment portions 85 a to 85 d are in contact with the side walls 101 c and 101 d extending in the left-right direction of the glass melting furnace 20. It is glued.

  In the mounting state described above, the cooling means 80 has the mounting portions 85a to 85d facing up and the V-shaped tip portion 81 positioned below. Moreover, the cooling means 80 is attached so that a front end portion 81 extending in the longitudinal direction extends along the front-rear direction orthogonal to the left-right direction. This is because a current flows along the horizontal direction of the second member 60 by applying a voltage with a potential difference between the heating means 70a at the right end and the heating means 70b at the left end. Then, in the front-rear direction orthogonal to the left-right direction in which the current flows, the potential difference is small or not based on the same principle as the bridge circuit, so that the current hardly flows or does not flow. Further, the cooling means 80 is disposed apart from the second member 60 through which a current flows, and is attached to the side walls 101c and 101d facing each other in the front-rear direction. This also prevents current from flowing through the cooling means 80 or does not flow. For this reason, the cooling means 80 is hardly heated or does not generate heat, and is adjusted to a temperature lower than the maximum melting temperature in the glass melting furnace 20. The longitudinal direction of the cooling unit 80 may be not only in the front-rear direction orthogonal to the left-right direction in which the current flows, but also in the direction intersecting with the left-right direction in which the current flows.

  Further, the angle θe that is an angle formed by the inclined portion 82 a and the inclined portion 82 b of the cooling means 80 is adjusted to an angle that allows the molten glass supplied from the second member 60 to be received by the cooling means 80. . Although not limited thereto, for example, the angle θe can be set to 45 to 120 °.

In the present invention, the “maximum melting temperature” is a temperature at which the molten glass in the glass melting furnace 20 is highest and is a temperature at which the glass material is melted. Further, the maximum melting temperature is a temperature at which the glass material is melted, and is a temperature at which the viscosity of the glass material is sufficiently lowered, for example, to 400 poise or less, preferably 100 poise or less, to completely dissolve the defects in the glass material. Is preferred. The maximum melting temperature can be selected depending on the shape, composition, and the like of the glass material. The glass composition constituting the glass material to be melted is expressed in mass% to be described later, and glass composition containing 56 ≦ SiO ₂ ≦ 66, 16 ≦ Al ₂ O ₃ ≦ 26, 10 ≦ MgO ≦ 20, or mass %, When the glass composition contains 45 ≦ SiO ₂ ≦ 60, 20 ≦ B ₂ O ₃ ≦ 30, 10 ≦ Al ₂ O ₃ ≦ 20, the maximum melting temperature is, for example, 1400 ° C. or higher. 1650 degrees C or less is mentioned, Preferably 1500 degrees C or more and 1650 degrees C or less are mentioned.

In the present invention, the “temperature lower than the maximum melting temperature” of the molten glass cooled by the cooling means 80 may be any temperature that is lower than the maximum melting temperature and can precipitate impurities contained in the molten glass. Depending on the impurities to be deposited, it is appropriately selected. For example, the “temperature lower than the maximum melting temperature” includes a liquid phase temperature of the glass material to be melted, which will be described later, or a 400 poise temperature of the glass material to be melted. Specifically, the “temperature lower than the maximum melting temperature” is a case where the impurity to be deposited is a metal compound containing platinum, and the glass composition constituting the glass material is expressed in mass% described later, and 56 ≦ Glass composition containing SiO ₂ ≦ 66, 16 ≦ Al ₂ O ₃ ≦ 26, 10 ≦ MgO ≦ 20, or expressed as mass%, 45 ≦ SiO ₂ ≦ 60, 20 ≦ B ₂ O ₃ ≦ 30, In the case of a glass composition containing 10 ≦ Al ₂ O ₃ ≦ 20, it is lower than the maximum melting temperature and is 1200 ° C. or higher and 1500 ° C. or lower, lower than the maximum melting temperature and 1200 ° C. or higher. It is preferably 1450 ° C. or lower, more preferably lower than the maximum melting temperature and 1200 ° C. or higher and 1400 ° C. or lower.

(3) Nozzle member 40
A nozzle member 40 is provided at the bottom of the third region 25 of the glass melting furnace 20. The nozzle member 40 has a plurality of nozzles 41 and discharges molten glass from the nozzles 41.

(4) Refractory material In order to melt the glass material, at least the glass melting furnace 20 of the manufacturing apparatus 100 is formed of a refractory material. Examples of the refractory material include a metal composed of a platinum element alone; a metal composed of a rhodium element alone; a metal composed of a palladium element alone; a metal composed of a gold element alone; a metal compound containing a platinum element; a metal compound containing a rhodium element; A metal compound containing an element; a metal compound containing a gold element; an alloy consisting of two or more selected from the group consisting of platinum, rhodium, palladium and gold; and at least one selected from the group consisting of refractory bricks included. In addition, the refractory material includes at least one selected from the group consisting of molybdenum, graphite, tin oxide, ceramic, alumina, chromium oxide, magnesia, zircon, zirconia, and yttrium oxide. Further, the refractory material includes combinations of the materials described above. For example, an alloy of a plurality of materials may be used as the refractory material. Further, a plurality of refractory materials may be combined as each layer. For example, in a furnace having a refractory brick as an outer wall, a plate material or a coating such as platinum or a platinum-rhodium alloy may be formed on the inner wall.

  Moreover, what is formed with a refractory material is not limited to the glass melting furnace 20. For example, at least one of the nozzle member 40, the first member 50, the second member 60, and the cooling means 80 may be formed of a refractory material.

(5) Glass material Glass material introduced into the manufacturing apparatus 100 includes glass raw materials such as powder (components of glass composition constituting glass material, for example, oxides such as SiO ₂ , Al ₂ O ₃ , MgO, etc.) ), And solid glass. Moreover, solid glass is glass which melt | dissolved glass raw materials, such as powder, and shape | molded in predetermined shapes, such as rod shape, spherical shape, flake shape, scale shape, for example. Further, when the glass product is glass fiber and is produced by a so-called direct melt method, and the manufacturing apparatus 100 is applied to a bushing, as a glass material put into the manufacturing apparatus 100, a molten glass in a molten state that can flow is used. You can also

As a glass composition which comprises the said glass material, a well-known glass composition can be used, for example, E glass, T glass, S glass, D glass, NE glass, L glass, C glass, AR glass etc. are mentioned. From the viewpoint that the melting temperature becomes higher, T glass, S glass, D glass, and NE glass are preferable. Specifically, for example, expressed in mass%, 56 ≦ SiO ₂ ≦ 66, 16 ≦ Al ₂ O ₃ ≦ 26, 10 ≦ MgO ≦ 20, or expressed in mass%, Examples include glass compositions containing 45 ≦ SiO ₂ ≦ 60, 20 ≦ B ₂ O ₃ ≦ 30, and 10 ≦ Al ₂ O ₃ ≦ 20.

(6) Manufacturing method of glass fiber Next, the flow from when the glass material is input from the input port 10 to when the glass fiber is discharged from the nozzle 41 will be described.
First, glass materials are sequentially fed into the first region 21 of the glass melting furnace 20 from the inlet 10 to melt the glass material. Therefore, the first region 21 is filled with a glass material, a glass material in the middle of melting, and a molten glass. Note that the first region 21 is heated to a temperature higher than the melting point of the glass material in order to melt the glass material. However, in the first region 21, the portion where the glass is successively poured in the vicinity of the inlet 10 is, for example, about 1400 ° C., although the temperature tends to be low and varies depending on the type of glass material.

  The molten glass melted in the first region 21 is received in contact with the first member 50 shown in FIG. 4 below the first region 21. Then, for example, the molten glass gradually flows from the central portion 51 toward the openings 53a and 53b along the upward inclination of the first member 50, against the weight of the molten glass. As the molten glass gradually flows in this way, the residence time of the molten glass on the first member 50 becomes longer than when the molten glass simply flows out of the openings 53a and 53b into the second region 23. Thereby, the time for melting the solid glass in the molten glass can be secured, and the solid glass in the molten glass can be completely melted. The molten glass from which the solid glass has been discharged is supplied to the second region 23 through the openings 53a and 53b.

  As described above, the first region 21 is heated to a high temperature above the melting point of the glass material. And since the opening 53 (53a, 53b) of the 1st member 50 is provided in the edge part of the left-right direction of the 1st member 50, and is adjacent to the heating means 70 (70a, 70b), it is the largest electric current. Flows, and the temperature is higher than that of the central portion 51. For these reasons, in the present embodiment, the vicinity of the opening 53 in the glass melting furnace 20 is a high temperature region in which the molten glass has the maximum melting temperature in the manufacturing apparatus 100. The maximum melting temperature varies depending on the type of glass material and the like, but is about 1650 ° C., for example.

  Next, since the molten glass in the first region 21 is successively supplied to the second region 23, the second region 23 is filled with the molten glass. Then, the molten glass flows to both end portions 62 a and 62 b of the second member 60 in accordance with a flow in which the molten glass is supplied to the second region 23 through the openings 53 a and 53 b of the first member 50. Further, the molten glass flows from the both end portions 62 a and 62 b toward the central portion 61 side along the inclination of the second member 60. The molten glass flows out from the plurality of openings 63 arranged at predetermined intervals to the third region 25 while being mixed in the course of flowing along the second member 60. Thereby, the substantially homogeneous molten glass flows out into the third region 25 almost uniformly and fills the third region 25.

  As described above, the second member 60 is inclined upward from the central portion 61 toward the right end portion 62a and the left end portion 62b, whereby the temperature of the entire nozzle member 40 can be kept substantially uniform. That is, the center part of the nozzle member 40 in the left-right direction is farther from the heating means 70 than the both ends of the nozzle member 40 in the left-right direction, and the temperature tends to be lower than the both ends due to the influence of the voltage drop. The central portion 61 of the second member 60 is located below the right end portion 62 a and the left end portion 62 b and is close to the nozzle member 40. Therefore, the heat of the central portion 61 of the second member 60 is easily transmitted to the central portion of the nozzle member 40, and the temperature drop at the central portion of the nozzle member 40 can be compensated.

  Next, the molten glass that has flowed out to the third region 25 is supplied to the cooling means 80 disposed corresponding to the opening 63. The cooling means 80 temporarily receives the molten glass by the space surrounded by the inclined portion 82a and the inclined portion 82b because the V-shaped tip portion 81 faces downward. That is, the molten glass is received and brought into contact with the inclined portions 82a and 82b, but since the molten glass is supplied one after another, the molten glass overflows from the cooling means 80.

  As described above, the cooling means 80 is adjusted to a temperature lower than the maximum melting temperature. Therefore, the molten glass temporarily received by the cooling means 80 is cooled to a temperature lower than the maximum melting temperature by contact with the cooling means 80. Thereby, the impurities which are fuse | melted in molten glass, for example, a part of refractory material fuse | melted with glass material, etc. can be deposited. The precipitated impurities adhere to the cooling means 80 and are collected.

  Furthermore, the molten glass supplied to the cooling means 80 from the opening 63 of the second member 60 rebounds from the inclined portions 82a and 82b, and the molten glass that is in contact with the inclined portions 82a and 82b is not in contact with the molten glass. Convection in the cooling means 80 due to a temperature difference from Therefore, not only the molten glass is cooled by the contact with the cooling means 80, but also the molten glass is mixed by convection in the cooling means 80, so that the amount of the molten glass to be cooled is increased and the cooling speed is also increased. improves. Thereby, a molten glass can be cooled efficiently and the impurity currently fuse | melted in a molten glass can be deposited.

  The meaning that the molten glass is cooled to a temperature lower than the maximum melting temperature mentioned above means that the molten glass is cooled to a temperature lower than the maximum melting degree, and cooling means lower than the maximum melting temperature. This includes the meaning that the molten glass is cooled so as to approach the temperature of the cooling means 80 by supplying the molten glass to 80. In the latter case, the molten glass is cooled by being brought into contact with the cooling means 80, but is not necessarily cooled to the temperature of the cooling means 80, and includes, for example, the case where it is cooled to a temperature close to the cooling means 80. .

  Moreover, the temperature of the cooling means 80 can be adjusted to a temperature higher than the liquidus temperature of the molten glass. When the molten glass becomes lower than the liquidus temperature, crystallization proceeds and the glass becomes devitrified and changes into crystal grains. Since glass fibers cannot be produced when devitrification occurs, the temperature of the cooling means 80 is preferably higher than the liquidus temperature of the glass material.

  Next, the molten glass from which at least a part of impurities has been recovered by the cooling means 80 is supplied to the nozzle member 40 below the third region 25. Therefore, glass fibers made of molten glass with few impurities can be discharged from the nozzle 41 of the nozzle member 40. The temperature of the nozzle member 40 is adjusted by the heating means 70 and varies depending on the glass material or the like, but is about 1400 ° C., for example.

  Further, as described above, the molten glass is supplied to the nozzle member 40 with the solid component in the molten glass sufficiently reduced in the first member 50. Therefore, molten glass with little solid component can be discharged from the nozzle 41, and the fall of the intensity | strength of glass product, etc. can be suppressed. Furthermore, since the temperature of the entire nozzle member 40 is substantially uniform due to the inclination of the second member 60, a substantially uniform glass fiber can be discharged from the nozzle 41.

<2. Features>
According to the glass product manufacturing apparatus 100 of the present invention, a glass product made of molten glass that can collect impurities (such as a part of a refractory material that is melted together with the glass material) adhering to the cooling means 80 and that has few impurities. Can be discharged from the nozzle 41. Conventionally, the higher the glass melting temperature, the larger the amount of impurities melted in the molten glass. Therefore, the above effect becomes more remarkable as the glass melting temperature increases. Examples of the glass material having a high melting temperature include a liquidus temperature of 800 to 1400 ° C., a temperature at which glass is easily formed, for example, a 1000 poise temperature that is easy to spin when the glass product is glass fiber. A glass material with a temperature of 1000 to 1400 ° C. is mentioned, and a glass material with a liquidus temperature of 900 to 1400 ° C. and a 1000 poise temperature of 1100 to 1400 ° C. is preferred. The liquidus temperature and 1000 poise temperature are measured as follows.
(1) 1000 poise temperature: After melting a glass material in a platinum crucible, the viscosity of the molten glass is continuously measured while changing the melting temperature using a rotary B-type viscometer, and the viscosity is 1000 poise. The corresponding temperature is set at 1000 poise temperature. For the measurement, a high-temperature rotational viscometer (manufactured by Shibaura System Co., Ltd.) is used according to JIS Z 8803-1991.
(2) Liquid phase temperature: A glass material is pulverized, placed in a platinum boat, and heated in a tubular electric furnace provided with a temperature gradient of 1000 ° C. to 1500 ° C. for 8 hours or more. A sample taken out from the electric furnace is observed with a polarizing microscope, and the temperature at which crystals begin to precipitate is defined as a liquidus temperature.

<3. Modification>
As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, A various change is possible unless it deviates from the meaning. For example, the following changes can be made. Moreover, the gist of the following modifications can be combined as appropriate.

<3-1>
(1) Modification 1 of cooling means
In the above embodiment, the cooling means 80 has a V shape with a sharp tip 81 when viewed from the side. However, the cooling means 80 only needs to be able to cool the molten glass, and may have a shape different from that of the above embodiment. FIG. 9 is a side view of a glass fiber manufacturing apparatus using another example of cooling means. FIG. 10 is a top view of the glass fiber manufacturing apparatus of FIG. As shown in FIGS. 9 and 10, the cooling means 800 may be a rod-like member extending in the front-rear direction. The cooling means 800 is means for cooling the molten glass to a temperature lower than the maximum melting temperature, as in the above embodiment.

  The cooling means 800 may be a solid bar-like member. In this case, the molten glass is cooled by contacting the outer peripheral surface of the cooling means 800. As a result, impurities in the molten glass are deposited and collected on the outer peripheral surface of the cooling means 800. Further, the cooling means 800 may be a rod-shaped member having a hollow central portion. In this case, in order to increase the cooling efficiency, at least one of air and liquid may flow through the cavity.

  Furthermore, the cooling means 800 may be a rod-like member extending in the up-down direction or the left-right direction, or may be a rod-like member extending in the direction of at least two combinations of the up-down direction, the front-rear direction, and the left-right direction. The rod-like member may have a columnar shape or an elliptical shape. Moreover, you may form so that a several fin may protrude from the outer peripheral surface of a rod-shaped member.

(2) Modification 2 of the cooling means
In the above embodiment, the cooling means 80 has a V shape with a sharp tip 81 when viewed from the side. However, the V shape includes a U shape in which the distal end portion 81 is bent at a gentle angle in a side view. Furthermore, the cooling means 80 is not limited to the V shape as long as the molten glass flowing out from the second member 60 can be temporarily received. For example, the cooling means 80 may have a shape having a concave portion opened upward, and may be, for example, a cup shape having a rectangular side view. For example, the cooling means 80 does not have the step portions 86a, 86b, 87a, 87b like the cooling means 80 of the above embodiment, but simply has a V shape, a U shape, a cup shape, or the like. Thus, the molten glass may be temporarily received and overflowed.

(3) Modification 3 of the cooling means
Unlike the said embodiment, side wall side surface 85a2-85d2 may be bent with respect to plate-shaped surface 85a1-85d1. FIG. 11 is a schematic diagram showing another example of cooling means. As shown in FIG. 11, the side wall side surfaces 85a2 to 85d2 are bent substantially at right angles to the plate-like surfaces 85a1 to 85d1. The side wall side surfaces 85a2 to 85d2 are portions that come into contact with the side walls 101c and 101d of the glass melting furnace 20, and the area of contact with the side walls 101c and 101d can be increased by increasing the area of the side wall side surfaces 85a2 to 85d2. Thereby, the cooling means 80 can be firmly fixed to the side walls 101c and 101d by welding or the like, for example.

  Moreover, in the said embodiment, the attaching parts 85a and 85b are bend | folded with the predetermined angle with respect to the connection parts 84a and 84b. However, the attachment parts 85a and 85b are along the V-shaped inclination like the connection parts 84a and 84b, and may extend in the same direction as the connection parts 84a and 84b.

  Moreover, in the said embodiment, the cooling means 80 has four attachment part 85a, 85b, 85c, 85d, as shown in FIG. However, any one of the attachment portions may be integrated. For example, the attachment portions 85a and 85c in FIG. 6 may be integrated as an attachment portion, and the attachment portions 85b and 85d in FIG. 6 may be integrated as an attachment portion.

(4) Modification 4 of cooling means
FIG. 12 is a schematic diagram showing another example of cooling means. As shown in FIG. 12, in the cooling means 80 of the above-described embodiment, a plurality of through holes 88 that penetrate through the inclined portions 82a and 82b may be formed. In the cooling means 80 of FIG. 12, the molten glass from the second member 60 is temporarily received by the inclined portions 82 a and 82 b and overflows from the cooling means 80, but also flows out from the through holes 88. Thus, the molten glass can be cooled by bringing it into contact with the inclined portions 82a and 82b, and can also be cooled by bringing it into contact with the inner wall of the through hole 88.

(5) Modification 5 of the cooling means
In the above embodiment, the cooling means 80 is formed of a plate-shaped member, but a space may be formed inside the plate-shaped member. Moreover, you may distribute | circulate at least any one of air and a liquid in the space inside a plate-shaped member.

<3-2>
In the manufacturing apparatus 100 of the above embodiment, only one second member 60 is provided. However, two or more second members may be provided. FIG. 13 is a side view of a glass fiber manufacturing apparatus provided with two second members. As illustrated in FIG. 13, the manufacturing apparatus 100 includes two second members 60 and 65. The second member 65 is provided between the second member 60 and the nozzle member 40. The configuration of the second member 65 is substantially the same as that of the second member 60. The cooling means 80 corresponding to the lower part separated from the second member 60 and the cooling means 180 corresponding to the lower part separated from the second member 65 are arranged so that the positional relationship in the left-right direction is shifted. Thereby, for example, the molten glass that has flowed out of the upper second member 60 and flows downward without being cooled by the cooling means 80 can be cooled by the cooling means 180 corresponding to the lower second member 65.

  However, unlike the above, the cooling means 80 corresponding to the second member 60 and the cooling means 180 corresponding to the second member 65 may be arranged at the same position in the left-right direction. For example, the molten glass can be cooled by contacting both of the two cooling means 80 and 180.

<3-3>
In the above embodiment, the temperature of the cooling means 80 is adjusted to a temperature lower than the maximum melting temperature. However, it is more preferable that the temperature of the cooling means 80 is set to be equal to or lower than the temperature of the nozzle member 40 or the temperature of the molten glass at the nozzle member 40. Before the nozzle member 40 from which the molten glass is discharged, the molten glass is cooled below the temperature of the nozzle member 40 or below the temperature of the molten glass at the nozzle member 40 to promote precipitation of impurities contained in the molten glass. it can. Therefore, problems such as the nozzle member 40 being clogged with impurities can be suppressed. Further, glass fibers made of molten glass with few impurities can be manufactured through the nozzle member 40.

  However, the temperature of the cooling means 80 may be a temperature lower than the maximum melting temperature of the molten glass in the glass melting furnace 20, and may be higher than the temperature of the nozzle member 40 or the temperature of the molten glass in the nozzle member 40. Good.

<3-4>
In the said embodiment, the 1st member 50 is a V-shaped plate-shaped member in side view. However, the V shape includes a U shape bent at a gentle angle in a side view. In addition, the first member 50 may be a member whose plane is inclined only in one direction and an opening is formed at an end located below. In other words, for example, the first member 50 may be inclined downward from the left end to the right end, and the right end may be open.

  Moreover, in the said embodiment, although the planar shape of the 1st member 50 is a rectangular shape according to the shape of the glass melting furnace 20, it is not limited to this. For example, a circular shape, an elliptical shape, a conical shape, or the like may be used. Further, the number of openings 53 (53a1, 53a2, 53b1, 53b2) of the first member 50 is not limited to four in the above embodiment, and may be more than four or less than four. The size, shape, and the like of the openings 53a and 53b are not particularly limited as long as the molten glass that has flowed gradually through the first member 50 can flow downward.

  Similarly, in the above-described embodiment, the second member 60 has a V-shape that is recessed toward the center in a side view, but the second member 60 may have a U-shape in a side view or a planar shape. There may be. Moreover, in the said embodiment, although the planar shape of the 2nd member 60 is rectangular shape, it is not limited to this, For example, circular shape and elliptical shape may be sufficient. Moreover, the opening 63 of the 2nd member 60 should just provide a molten glass to the nozzle member 40 substantially uniformly, The magnitude | size and shape are not specifically limited.

<3-5>
In the above embodiment, the second member 60 is provided, but the second member 60 may be omitted. FIG. 14 is a perspective view of another form of glass fiber manufacturing apparatus. FIG. 15 is a side view of the glass fiber manufacturing apparatus of FIG. FIG. 16 is a perspective view showing a state in which the cooling means is attached to the side wall. As shown in FIGS. 13 to 16, in the manufacturing apparatus 100, the second member 60 of the above embodiment is omitted, and the glass melting furnace 20 is divided into a first region 21 and a second region 27 by the first member 50. ing. Moreover, the cooling means 80 is attached to the side walls 101c and 101d of the glass melting furnace 20, as shown in FIG. Specifically, in the cooling means 80, the side wall side surfaces 85a2 to 85d2 of the attachment portions 85a to 85d are in contact with the side walls 101c and 101d extending in the left-right direction of the glass melting furnace 20, and are bonded by, for example, welding. Note that the cooling means 80 is not limited to the arrangement along the arc extending in the left-right direction as shown in FIG. 13 in a side view, and may be arranged on a straight line in the left-right direction, for example, or randomly arranged. Also good.

<3-6>
In the above embodiment, the glass fiber manufacturing apparatus 100 having the cooling means 80 has been described. However, the cooling means 80 may be applied to a solid glass manufacturing apparatus that manufactures a solid glass as a glass fiber raw material from a glass raw material such as powder. FIG. 17 is a side view of the solid glass manufacturing apparatus. The solid glass manufacturing apparatus 200 is different from the glass fiber manufacturing apparatus 100 of the above-described embodiment in that the first member 50 is not provided, and the other points are the same. The solid glass manufacturing apparatus 200 is divided into a first region 28 and a second region 29 by a second member 60. In the glass fiber manufacturing apparatus 100, the first member 50 is provided in order to sufficiently reduce the solid component in the molten glass. However, the solid glass produced from the solid glass production apparatus 200 may be sufficiently dissolved in the glass fiber production apparatus 100 in the subsequent process, and may contain a solid component. Therefore, in the solid glass manufacturing apparatus 200 of FIG. 17, the first member is not provided. However, the first member may also be provided in the solid glass manufacturing apparatus 200.

<3-7>
In the present embodiment, the insertion port 10 is provided on the top of the manufacturing apparatus 100. However, the inlet 10 may be provided on the side wall of the glass melting furnace 20. Further, when the glass material is directly charged into the glass melting furnace 20, the charging port 10 may not be provided.

<3-8>
In the above embodiment, the cooling means 80 is attached to the side walls 101c and 101d, but the attachment of the cooling means 80 is not limited to this. FIG. 18 is a schematic diagram showing a state in which the cooling means is attached to the second member and the side wall. FIG. 19 is an enlarged view of a portion B in FIG. 18 and is a schematic diagram showing a state in which the cooling means is attached to the second member. 20 is a side view of FIG. For example, the cooling means 80 may be attached to the second member 60 and the side walls 101c and 101d. In this case, as shown in FIGS. 6, 19, and 20, the plate-like surfaces 85 a 1 to 85 d 1 of the attachment portions 85 a to 85 d are in contact with the lower surface of the second member 60 and bonded by, for example, welding. Furthermore, the side wall side surfaces 85a2 to 85d2 of the attachment portions 85a to 85d are in contact with the side walls 101c and 101d and bonded by, for example, welding.

  As described above, the cooling means 80 is adhered not only to the side walls 101 c and 101 d but also to the second member 60. In this case, the direction of the current flowing in the left-right direction through the second member 60 intersects with the longitudinal direction in which the tip 81 of the cooling means 80 extends. Therefore, since the current hardly flows or does not flow through the cooling unit 80, the cooling unit 80 is hardly heated or does not generate heat, and is adjusted to a temperature lower than the maximum melting temperature in the glass melting furnace 20.

  When the cooling means 80 is attached as shown in FIG. 19, since the cooling means 80 has the step portions 87a and 87b, there is generally no gap between the lower surface of the second member 60 and the inclined portions 82a and 82b. A rectangular gap is formed. Moreover, since the cooling means 80 has the step part 86a (FIG. 19, FIG. 6 (a)), 86b (FIG. 6 (a)), the lower surface of the 2nd member 60 and the inclined part 82a, 82b are included. A substantially V-shaped gap is formed between them. In this case, when molten glass is supplied to the cooling means 80 from the opening 63 of the second member 60, the molten glass is received by the inclined portions 82a and 82b, but through the gaps formed by the step portions 86a, 86b, 87a, and 87b. And flows out of the cooling means 80. About another point, it is the same as that of the said embodiment.

  Unlike the above, the cooling means 80 may be attached only to the second member 60 without being attached to the side walls 101c and 101d. The cooling means 80 can also be applied to fore-hearth and bushing in glass fiber production.

<3-9>
It does not specifically limit as a glass product manufactured in the manufacturing apparatus 100 of this invention. Examples thereof include glass fiber, glass roving, glass flake, glass pellet, glass bead, glass filler, and glass marble. Among them, when the impurity to be precipitated is a metal compound, the effect of the present invention is particularly remarkable when the metal compound is used for a preferable use, for example, a glass product for an electronic material (including a printed wiring board). More preferred.

  In the manufacturing apparatus 100 of the present invention, for example, when manufacturing glass flakes, glass pellets, glass beads, glass filler, or glass marble, in addition to the manufacturing apparatus 100, the molten glass discharged from the nozzle 41 has a predetermined size. A size adjusting means (not shown) for forming and a forming means (not shown) for forming into a predetermined shape can be provided. The size adjusting means and the forming means may be known ones. In the case of glass marble, for example, as the size adjusting means, the molten glass discharged from the nozzle 41 is cut into a predetermined size, and a bump (molten glass lump) is obtained. As a forming means, there are provided two adjacent spiral rolls that can be rotated, and the obtained rolls are arranged between the two rotating spiral rolls. And a molding device that cools to room temperature while being conveyed in the longitudinal direction and molds it into a marble shape. In the case of glass pellets, for example, as a size adjusting means, the molten glass discharged from the nozzle 41 is cut into a predetermined size to form a bump (molten glass lump), and water cooling for cooling the bump. An apparatus.

<3-10>
The platinum group metal recovery method of the present invention can be realized using the glass product manufacturing apparatus 100 of the present invention. When the refractory material contains a platinum group metal, the recovery method includes a step of preparing the glass product manufacturing apparatus 100 and a step of recovering the platinum group metal deposited on the cooling means 80. For example, when the glass product is a glass fiber, the platinum group metal deposited on the cooling means 80 can be recovered by removing the molten glass in the glass melting furnace after finishing the service life of the glass fiber manufacturing apparatus. Thereby, it becomes possible to reduce wear of an expensive platinum group metal. The recovery of the platinum group metal from the cooling means 80 is performed by a known means.

10: loading port 20: glass melting furnace 40: nozzle member 41: nozzle 50: first member 60: second member 70: heating means 80: cooling means 100: manufacturing apparatus

Claims (9)

A slot into which glass material is charged;
A glass melting furnace in which at least the inner wall surface is formed of a refractory material, is continuous with the charging port, and melts the charged glass material to generate molten glass;
At least one nozzle provided at a lower portion of the glass melting furnace and discharging the molten glass;
Heating means for heating the glass melting furnace and the nozzle;
In the glass melting furnace, at least one cooling means is disposed between the nozzle and the high temperature region where the molten glass has a maximum melting temperature and cools the molten glass to a temperature lower than the maximum melting temperature of the molten glass. When,
Equipped with a,
The heating means has a terminal for applying a voltage to the glass melting furnace to flow a current in a predetermined direction,
The cooling means is constituted by a conductive member through which the current flows, and the conductive member is arranged to extend in a direction intersecting the predetermined direction through which the current flows.
An apparatus for manufacturing a glass product, wherein both ends of the conductive member in a direction intersecting the predetermined direction in which the current flows are in contact with a side wall of the glass melting furnace . Provided in a region including the high temperature region, further comprising a partition member for partitioning the glass melting furnace in the vertical direction;
The said partition member is a manufacturing apparatus of the glassware of Claim 1 which has an opening in the said edge part while it is formed so that it may incline upwards, so that it goes to an edge part from a center part.   The said cooling means is a manufacturing apparatus of the glass product of Claim 1 or 2 which cools the said molten glass to the temperature close | similar to the molten glass in the said nozzle, or the temperature of the molten glass in the said nozzle.   The said cooling means is a glassware manufacturing apparatus in any one of Claims 1-3 comprised so that it may have a recessed part open | released upwards. The refractory material includes: a metal composed of a simple platinum element; a metal composed of a simple rhodium element; a metal composed of a simple palladium element; a metal composed of a simple gold element; a metal compound containing a platinum element; a metal compound containing a rhodium element; A metal compound containing gold element; a metal compound containing gold element; an alloy composed of two or more selected from the group consisting of platinum element, rhodium element, palladium element and gold element; and at least one selected from the group consisting of refractory bricks; The manufacturing apparatus of the glass product in any one of Claims 1-4 containing. The nozzle, the is configured to be discharged is passed through the molten glass is cooled and solidified, the glass product manufacturing apparatus according to any one of claims 1-5. The glass product manufacturing apparatus according to any one of claims 1 to 6 , wherein the glass product is glass fiber, glass roving, glass flake, glass pellet, glass bead, glass filler, or glass marble. Using the manufacturing apparatus for a glass product according to any one of claims 1 to 7 method of manufacturing a glass product. A platinum group metal recovery method comprising:
A step of preparing the glassware manufacturing apparatus according to any one of claims 1 to 7 , wherein the refractory material contains a platinum group metal; and
Recovering the platinum group metal deposited on the cooling means;
A method for recovering a platinum group metal.